TY - JOUR
T1 - A Chandra Virgo cluster survey of spiral galaxies : I. Introduction to the survey and a new ULX sample
AU - Soria, R.
AU - Kolehmainen, M.
AU - Graham, A. W.
AU - Swartz, D. A.
AU - Yukita, M.
AU - Motch, C.
AU - Jarrett, Thomas H.
AU - Miller-Jones, J. C. A.
AU - Plotkin, R. M.
AU - MacCarone, T. J.
AU - Ferrarese, L.
AU - Guest, A.
AU - Lançon, A.
PY - 2022
Y1 - 2022
N2 - We present an analysis of the ultraluminous X-ray source (ULX) population in 75 Virgo cluster late-Type galaxies, including all those with a star formation rate >1 M yr-1 and a representative sample of the less star forming ones. This study is based on 110 observations obtained over 20 yr with the Chandra X-ray Observatory Advanced Camera for Imaging Spectroscopy. As part of a Large Chandra Program, new observations were obtained for 52 of these 75 galaxies. The data are complete to a sensitivity of ≈1039 erg s-1, with a typical detection limit of ≈3 x 1038 erg s-1 for the majority of the sources. The catalogue contains about 80 ULXs (0.3-10 keV luminosity >1039 erg s-1), and provides their location, observed flux, de-Absorbed luminosity, and (for the 25 most luminous ones) simple X-ray spectral properties. We discuss the ULX luminosity function in relation to the mass and star formation rate of the sample galaxies. We show that recent models of low-mass plus high-mass X-ray binary populations (scaling with stellar mass and star formation rate, respectively) are mostly consistent with our observational results. We tentatively identify the most luminous X-ray source in the sample (a source in IC 3322A with LX ≈ 6 x 1040 erg s-1) as a recent supernova or its young remnant. The properties of the sample galaxies (morphologies, stellar masses, star formation rates, total X-ray luminosities from their point-source population) are also summarized.
AB - We present an analysis of the ultraluminous X-ray source (ULX) population in 75 Virgo cluster late-Type galaxies, including all those with a star formation rate >1 M yr-1 and a representative sample of the less star forming ones. This study is based on 110 observations obtained over 20 yr with the Chandra X-ray Observatory Advanced Camera for Imaging Spectroscopy. As part of a Large Chandra Program, new observations were obtained for 52 of these 75 galaxies. The data are complete to a sensitivity of ≈1039 erg s-1, with a typical detection limit of ≈3 x 1038 erg s-1 for the majority of the sources. The catalogue contains about 80 ULXs (0.3-10 keV luminosity >1039 erg s-1), and provides their location, observed flux, de-Absorbed luminosity, and (for the 25 most luminous ones) simple X-ray spectral properties. We discuss the ULX luminosity function in relation to the mass and star formation rate of the sample galaxies. We show that recent models of low-mass plus high-mass X-ray binary populations (scaling with stellar mass and star formation rate, respectively) are mostly consistent with our observational results. We tentatively identify the most luminous X-ray source in the sample (a source in IC 3322A with LX ≈ 6 x 1040 erg s-1) as a recent supernova or its young remnant. The properties of the sample galaxies (morphologies, stellar masses, star formation rates, total X-ray luminosities from their point-source population) are also summarized.
UR - https://hdl.handle.net/1959.7/uws:77119
U2 - 10.1093/mnras/stac148
DO - 10.1093/mnras/stac148
M3 - Article
SN - 0035-8711
VL - 512
SP - 3284
EP - 3311
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
IS - 3
ER -